
svg {
    width: 100%;
    height: 100%;
    z-index: 3;
}
.node, .dragHandle, .line {
    fill: white;
    stroke: black;
    stroke-width: 1;
    cursor: pointer;
}
.node:hover, .line:hover, .dragHandle:hover {
    stroke: blue;
    stroke-width: 3;
}